2015ApJ...805..177D


Query : 2015ApJ...805..177D

2015ApJ...805..177D - Astrophys. J., 805, 177 (2015/June-1)

Ultraviolet morphology and unobscured UV star formation rates of CLASH brightest cluster galaxies.

DONAHUE M., CONNOR T., FOGARTY K., LI Y., VOIT G.M., POSTMAN M., KOEKEMOER A., MOUSTAKAS J., BRADLEY L. and FORD H.

Abstract (from CDS):

Brightest cluster galaxies (BCGs) are usually quiescent, but many exhibit star formation. Here we exploit the opportunity provided by rest-frame UV imaging of galaxy clusters in the Cluster Lensing and Supernovae with Hubble (CLASH) Multi-Cycle Treasury Project to reveal the diversity of UV morphologies in BCGs and to compare them with recent simulations of the cool, star-forming gas structures produced by precipitation-driven feedback. All of the CLASH BCGs are detected in the rest-frame UV (280 nm), regardless of their star formation activity, because evolved stellar populations produce a modest amount of UV light that traces the relatively smooth, symmetric, and centrally peaked stellar distribution seen in the near infrared. Ultraviolet morphologies among the BCGs with strong UV excesses exhibit distinctive knots, multiple elongated clumps, and extended filaments of emission that distinctly differ from the smooth profiles of the UV-quiet BCGs. These structures, which are similar to those seen in the few star-forming BCGs observed in the UV at low redshift, are suggestive of bi-polar streams of clumpy star formation, but not of spiral arms or large, kiloparsec-scale disks. Based on the number of streams and lack of culprit companion galaxies, these streams are unlikely to have arisen from multiple collisions with gas-rich galaxies. These star-forming UV structures are morphologically similar to the cold-gas structures produced in simulations of precipitation-driven active galactic nucleus feedback in which jets uplift low-entropy gas to greater altitudes, causing it to condense. Unobscured star formation rates estimated from CLASH UV images using the Kennicutt relation range up to 80 M/yr in the most extended and highly structured systems. The circumgalactic gas-entropy threshold for star formation in CLASH BCGs at z∼0.2-0.5 is indistinguishable from that for clusters at z < 0.2.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: intracluster medium - galaxies: elliptical and lenticular, cD - galaxies: formation - galaxies: structure - ultraviolet: galaxies

Status at CDS : Examining the need for a new acronym.

Simbad objects: 49

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Number of rows : 49
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J01315250-1336409 BiC 01 31 52.509 -13 36 41.00   18.76 17.00 16.41   ~ 12 0
2 ACO 209 ClG 01 31 57.5 -13 34 35           ~ 260 0
3 SDSS J024803.39-033145.2 BiC 02 48 03.392 -03 31 45.22   17.89   15.76   ~ 20 1
4 ACO 383 ClG 02 48 06.9 -03 29 32           ~ 312 0
5 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3663 3
6 [SES2008] J032941.68-021148.9 BiC 03 29 41.5725 -02 11 46.431           ~ 9 0
7 ClG J0329-0212 ClG 03 29 41.6 -02 11 47           ~ 116 0
8 MCS J0416.1-2403 ClG 04 16 08.380 -24 04 20.80           ~ 242 0
9 ClG J0429-0253 ClG 04 29 36.0 -02 53 09           ~ 104 0
10 2MASX J04293604-0253073 BiC 04 29 36.0092 -02 53 06.691           ~ 8 0
11 ClG J0647+7015 ClG 06 47 50.0 +70 14 55           ~ 131 0
12 [REE2012] J064750.7+701454 BiC 06 47 50.638 +70 14 54.42           ~ 5 0
13 B3 0714+378 Rad 07 17 36.50 +37 45 23.0           ~ 169 2
14 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 387 0
15 2MASX J07173724+3744224 BiC 07 17 37.2116 +37 44 22.965           ~ 7 0
16 ClG J0744+3927 ClG 07 44 52.5 +39 27 30           ~ 166 0
17 [SJV2010] J074452.793+392726.947 BiC 07 44 52.778 +39 27 26.78           ~ 8 0
18 2MASXI J0800568+360324 BiC 08 00 56.849 +36 03 23.47         16.6 ~ 22 0
19 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 234 0
20 [YHW2016] 168.96626+01.49863 BiC 11 15 51.902 +01 29 55.07           ~ 13 0
21 MCS J1115.8+0129 ClG 11 15 52.1 +01 29 53           ~ 110 0
22 DES J114935.68+222354.5 BiC 11 49 35.688 +22 23 54.60           ~ 12 0
23 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 351 0
24 2MASX J11571737+3336399 BiC 11 57 17.322 +33 36 39.34   18.0       ~ 16 0
25 ACO 1423 ClG 11 57 47.34 +33 42 43.5           ~ 149 0
26 [GSB2009] J120612.17-084802.9 G 12 06 12.10 -08 48 03.3           ~ 7 0
27 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 195 0
28 ClG J1226+3332 ClG 12 26 57.7 +33 32 50           ~ 198 0
29 GALEX J122658.7+333249 BiC 12 26 58.25 +33 32 48.6     21.09   19.13 ~ 7 0
30 ClG J1311-0311 ClG 13 11 01.7 -03 10 38           ~ 96 0
31 [CK2002] C47306-4509 BiC 13 47 30.65 -11 45 09.0           ~ 8 0
32 ClG J1347-1145 ClG 13 47 33.5 -11 45 42           ~ 491 0
33 ClG J1423+2404 ClG 14 23 47.7 +24 04 40           ~ 184 0
34 [REE2012] J142347.9+240442 BiC 14 23 47.876 +24 04 42.45           ~ 10 0
35 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7   ~ 136 0
36 ClG J1532+3021 ClG 15 32 53.8 +30 21 00           ~ 98 0
37 [YHW2016] 260.06989+35.60736 BiC 17 20 16.775 +35 36 26.50           ~ 8 0
38 ClG J1720+3536 ClG 17 20 16.8 +35 36 27           ~ 122 1
39 2MASX J17222717+3207571 BiC 17 22 27.185 +32 07 57.25           ~ 39 1
40 ACO 2261 ClG 17 22 28.3 +32 09 13           ~ 303 0
41 ClG J1931-2635 ClG 19 31 49.6 -26 34 33           ~ 137 0
42 ClG J2129-0741 ClG 21 29 26.0 -07 41 28           ~ 144 0
43 SDSS J212926.12-074127.8 BiC 21 29 26.127 -07 41 27.85         19.42 ~ 11 0
44 SDSS J212939.95+000521.1 BiC 21 29 39.953 +00 05 21.16           ~ 29 0
45 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 230 0
46 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 356 0
47 2MASX J21401517-2339398 BLL 21 40 15.176 -23 39 39.88       16.7   ~ 16 1
48 2MASX J22484405-4431507 BiC 22 48 44.055 -44 31 50.78           ~ 14 0
49 ACO S 1063 ClG 22 48 54.3 -44 31 07           ~ 227 0

    Equat.    Gal    SGal    Ecl

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2021.07.28-18:26:16

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